# Poja > Knowledge base documentation for Poja. ## v1 - [Architecture overview](https://docs.poja.io/docs/poja-architecture-aws-lambda-snapstart.md): How Poja works under the hood: AWS Lambda with SnapStart for sub-second cold starts, and all the architecture details - [CI/CD](https://docs.poja.io/docs/poja-cicd-pipeline-github-actions-deployment.md): How Poja's CI/CD pipeline works: branch-to-environment mapping, GitHub Actions workflows, build steps, format checks, and deployment lifecycle. - [Hello world, but straight to the cloud](https://docs.poja.io/docs/deploy-spring-boot-hello-world-application-to-the-cloud.md): Create then deploy a Spring Boot application into the cloud. Easily, in a few clicks. And quickly, in a few minutes. - [Hello world, but with a prod environment](https://docs.poja.io/docs/hello-world-but-with-a-prod-environment.md): Deploy a Spring Boot application on the cloud, with prod and preprod environments. Easily, in a few clicks. And quickly, in a few minutes. - [Hello world, but with persistent memories](https://docs.poja.io/docs/hello-world-but-with-persistent-memories.md): Create then deploy into the cloud a Spring Boot application that uses an Amazon S3 bucket for file storage. Easily, in a few clicks. And quickly, in a few minutes. - [Hello world, but with asynchronous reply by email](https://docs.poja.io/docs/hello-world-but-with-asynchronous-reply-by-email.md): Create then deploy into the cloud a Spring Boot application that performs asynchronous operations, through asynchronous workers that consume events/messages. Easily, in a few clicks. And quickly, in a few minutes. - [Hello world, but with scheduled email sending](https://docs.poja.io/docs/hello-world-but-with-scheduled-tasks.md): Add scheduled email sending to a Spring Boot Hello World application using Poja’s Scheduled Tasks, so it automatically triggers daily jobs with cron-like scheduling. Deploy it in minutes to the cloud with no cold starts and effortless autoscaling — quick, easy, and in just a few clicks. - [Hello world, but with 1 000 simultaneous calls for 10 minutes straight](https://docs.poja.io/docs/hello-world-but-with-1000-simultaneous-calls-for-10-minutes-straight.md): Create then deploy into the cloud a Spring Boot application that autoscales for facing heavy load, with no cold start. Easily, in a few clicks. And quickly, in a few minutes. - [Monitor errors with Sentry](https://docs.poja.io/docs/monitor-errors-with-sentry.md) - [Deployment unexpectedly fails without triggering the GitHub Workflow](https://docs.poja.io/docs/deployment-unexpectedly-fail-without-triggering-the-github-workflow.md) - [Query Parameters Unexpectedly Modified by API Gateway](https://docs.poja.io/docs/query-parameters-unexpectedly-modified-by-api-gateway.md) - [Code is incorrect and will not compile, says my IDE](https://docs.poja.io/docs/ide-says-code-is-incorrect.md)